Slide rules HOME page | COLLECTION | NON-STANDARD RULES |
Make | Fowler, Manchester, UK |
Model | Long-scale |
Notes 1. In original leather case. 2. A copy of the instructions can be found here. 3. On the front face there is a "long" scale, over several circles, and a "short" scale, the outer circle only. 4. On the rear there is another short scale and trig and log scales. |
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Front view |
Back view |
Detail - showing long scale |
Detail - showing trig and log scales
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Manufacturing date | 1954 (date on slip of paper in box) |
Length | Circular |
Material | |
Scales | Front face: "short-scale" and "long-scale" logarithmic. Rear face: "short-scale", reciprocals, square roots, sin, tan, sin/tan |
Documentation | Original documentation but damaged along fold lines. |
Condition | Very good. |